Special badges are worn by children whose parents hire the robot babysitter; this badge (undoubtedly RFID-based) can identify children with their names and ages. It can even briefly chat with them.

Tmsuk's nannybot can even project images to entertain the little tykes. With these features, desperate parents on Saturday nights will be saying "Tmsuk, you're my only hope."

(R2D2 uses his holographic projection feature)

SF fans no doubt remember the robot nanny from Philip K. Dick's 1955 short story Nanny:

"Come on!" Bobby shouted.

Abruptly Nanny moved, spinning slightly as her treads gripped the floor and turned her around. One of her side doors opened. A long metal rod shot out. Playfully, Nanny caught Bobby's arm with her grapple and drew him to her. She perched him on her back. Bobby's legs straddled the metal hull. He kicked with his heels excitedly, jumping up and down.
(Read more about Dick's robot nanny)